There’s an interesting article here about the Cheyenne Mountain facility in Colorado. For those of you who are fans, this is the site of the headquarters of Stargate Command in the show Stargate SG-1. The Air Force is looking to keep the base running, but transfer the NORAD-type air command to Peterson AFB. Take a look in particular at the description of how the facility is laid out. Definitely one of the safer places to be in case of a foreign nuclear attack (even if it wouldn’t be so good if there were an alien incursion.)